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Status report of MPPC mass measurement

15/20. Status report of MPPC mass measurement. ADC measurement Threshold curve measurement. 2007/Jan/30 Shinshu Univ. HE lab. M2 Takashi Tsubokawa. 1/15. 1/4. Measurement setup. Gate generator. LED Driver. Coincidence. Clock Generator. Thermo-static chamber

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Status report of MPPC mass measurement

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  1. 15/20 Status report of MPPC mass measurement • ADC measurement • Threshold curve measurement 2007/Jan/30 Shinshu Univ. HE lab. M2 TakashiTsubokawa 1/15 1/4

  2. Measurement setup Gate generator LED Driver Coincidence Clock Generator Thermo-static chamber (kept at 15 oC) LED 470nm Output register MPPC ・・・ 16chASD ADC Bias voltage 10chMPPC board Gain Noise rate Control PC Discri Scaler MPPC FPCB One channel on the board is kept as reference 2/4

  3. 19/20 Measurement time (data taking) • Gain measurement • Change MPPCs ,,,,,,,,,,,,,,,,,,,,,,,,2min • Stabilize temperature ,,,,,,,,,,,,,,,,,,,,,,,,5min • ADC data taking ,,,,,,,,,,,,,,,,,,,,,,,,3min Sum:10min / 9MPPC(1 FPCB sheet) • Noise rate measurement • Change MPPCs ,,,,,,,,,,,,,,,,,,,,,,,,2min • Stabilize temperature ,,,,,,,,,,,,,,,,,,,,,,,,5min • Discriminator curve data taking ,,,,,,,,,,,,,,,,,,,,9min Sum:16min / 9MPPC(1 FPCB sheet) All:26min / 9MPPC(1 FPCB sheet) 3/4

  4. Progress • Re-measurement have been finished • 600 MPPCs have been delivered on Feb-8 2007 • 351 MPPCs with FPCB • 249 plastic-package MPPCs • 351 MPPCs with FPCB have been measured. • Analysis of re-measurement and 351 MPPCs measurement is on going. Analysis will be done as soon as possible 4/4

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